Make a simple dialogue based on this situation : you see your friend doesn't do the biology task properly. Ask him/her motive

u: why didn't you do your biology task?
ur friend: i don't really get it
u: you know that you can always ask the teacher, right? Biology is important, it's one of the main subjects. You better do your task if you don't want to fail
ur friend: I see. I will do it